A(n) is a protein and/or sugar molecule on the surface of a cell that allows the immune system to identify whether or not that cell poses a threat.

Answers

Answer 1

Answer:

Antigen

Explanation:


Related Questions

freshwater fish excrete nitrogenous wastes as _____.

Answers

It released such as poop and children

glycolysis begins with _________ and ends with __________.

Answers

Answer:

Glycolysis starts with one molecule of glucose and ends with two pyruvate (pyruvic acid) molecules, a total of four ATP molecules, and two molecules of NADH.

Explanation:

Answer:

1 glucose molecule

2 pyruvic acid molecules

Explanation:

Glycolysis starts with 1 glucose molecule, which undergoes 4 stages until it splits into 2 pyruvic acid molecules. The products of this biochemical pathway include 2 NADH and 2 ATP molecules

What are the little hairs that line the nasal cavity and help trap microorganisms?

Answers

Answer:

c. Cilia is correct

Explanation:

Under the hypothesis of blending inheritance, what color(s) would the offspring of a black cat and a white cat be

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Under the hypothesis of blending inheritance, the offspring of a black cat and a white cat would be GREY.  This theory is not now accepted.

Blending inheritance is an erroneous theory from the 19th century that proposed that offspring inherit phenotypic traits as 'average values' observed for such traits in their parents.

Mendel's laws of heredity (i.e., the Law of Segregation and the Law of Independent Assortment) showed that blending inheritance is based on erroneous concepts.

Moreover, incomplete dominance is an inheritance pattern different from blending inheritance because incomplete dominance refers to the observation that in certain traits both gene variants or 'alleles' are expressed in heterozygous individuals.

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I need the order please

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What are the options

Recall what you know about hypertonic, hypotonic, and isotonic solutions. When an environment is hypotonic, what happens
to the cell?

Answers

Hypotonic solutions are lowly concentrated solutions
Hypertonic are highly concentrated solutions
While isotonic have equally concentrated

When a cell is placed in a hypotonic sol water moves out of the cell by osmosis making the cell flaccid

When a cell is submerged in a hypotonic solution, water osmosis causes the cell to become flaccid.

What is osmosis?

A semi-permeable membrane is used in the process of osmosis, which allows solvent molecules to move from a solution of low concentration to a solution of high concentration.

Osmosis is a passive process that doesn't require any energy to complete. In order for the concentrations on either side of the membrane to be equal, molecules must shift from an area of greater concentration to one of lower concentration.

Any solvent, including gases and supercritical liquids, can go through the osmosis process.

When solute concentrations inside and outside of the cell are equal, an isotonic solution has been created.When the concentration of solutes outside the cell is higher than within, the solution is said to be hypertonic. When the concentration of solutes inside the cell is higher than outside, the solution is said to be hypotonic.

Therefore, when a cell is submerged in a hypotonic solution, water osmosis causes the cell to become flaccid.

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the countries with the highest fertility rates are also the ones with the highest infant mortality rates. which one causes which and how do we know?

Answers

Answer: Higher infant mortality rates cause higher fertility rates.

Explanation:

Countries with high infant mortality rates are usually countries where families rely on children to help out the family. High infant mortality rates and a need for children means that those people will continue to try to have children until they have some that survive. If more children die, and people need to have more children, there will be a higher fertility rate.

What would be most likely to happen to a plant that had working chloroplasts in its cells but had taken in a poison that kept mitochondria from working? (1 point)1.It would use its chloroplasts to do the work the mitochondria should have done.2.It would use the energy from the Sun to replace the energy provided by mitochondria.3.It would have a difficult time gathering enough solar energy during photosynthesis.4.It would not be affected since plants do not require mitochondria.

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Answer:

It would use its chloroplasts to do the work the mitochondria should have done

Give an example in which you control temperature to influence a chemical change.

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Answer:

100* farenhights

Explanation:

If a sexually reproducing organism has 28 chromosomes in it body cells, how many chromosome did it inherit from each parent?

A. 7
B. 14
C. 16
D.28

Answers

14 is the correct answer. The reason being 28 divided between two parents is 14!

what hormone directly opposes the actions of natriuretic hormones?

Answers

Aldosterone!
Explanation: Aldosterone reabsorbs sodium in which is associated with osmotic recovery of water is in direct opposition of natriuretic hormones since it allows secretion of water.

The hormone that directly opposes the actions of natriuretic hormones is aldosterone.

Aldosterone is a hormone produced by the adrenal glands, specifically the adrenal cortex. It acts on the kidneys to promote the reabsorption of sodium ions and the excretion of potassium ions.

Natriuretic hormones, on the other hand, promote the excretion of sodium ions and the reabsorption of potassium ions in the kidneys, leading to increased urine production and decreased blood volume.

Therefore, aldosterone counteracts the effects of natriuretic hormones by increasing sodium reabsorption and reducing potassium excretion, which helps to retain water and maintain blood pressure.

In summary, while natriuretic hormones promote sodium excretion and water loss, aldosterone works in the opposite direction by promoting sodium reabsorption and water retention.

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which of the following is not an example of symbiosis? A. red blood cells containing malaria B. vines using a tree for support C. nitrogen-fixing bacteria and roots of legumes D. pigs feeding at a trough

Answers

Answer:

A. red blood cells containing malaria

Explanation:

Also, just as a heads up. I saw the previous person posted a link. Remember not to click any links that lead to domains which are unknown to you. They could hold a virus.

Answer:

A

Explanation:

Oi, Its worth 40 points, plus brainliest to best answer.


Use the graph and the information provided to answer the questions.
Stickleback fish protect themselves from predators with a thick covering of brownish plates. They feed on
small aquatic organisms and are preyed upon by bigger fish like trout. In a certain lake, the number of
stickleback fish was documented over a period of 30 years. During this time, the clarity of the lake water
also changed.



1. How did the occurrences of the different traits change over the 30-year period? Use evidence from
the graph to support your answer. Using what you know about natural selection and adaptation, what
generalization can you make based on these changes?

Answers

Explanation:

scam fakeeee

just kidding the answer is

every time the differences will change because of the large fishes which kill the small ones and the fishes het big like in one big fish there will be 100 of small fishes like the megladon

during this blood also leaks and the colour of the lake changes

Answer:

In each instance, the variations in fish populations are subject to change due to the predation of larger fish on smaller ones. As a result, the surviving fish grow larger, akin to the manner in which the Megalodon can have hundreds of smaller fish within its body. This process can also result in the release of blood, which has the potential to alter the color of the surrounding water body.

Explanation:

Help quick!!!!!! In dire need 1st and the correct answer gets brainliest.

Answers

Answer:

they can all be applied to other plants.

they can all be easily observed (i got the question right on the test :)

what is the texture of a butterfly wing.​

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Answer: soft, chalkey

Explanation: .

17) The function of the kidneys is to cleanse the blood. To do that, kidneys filter almost everything from the blood, and then put most everything back in to the blood. One of the
substances filtered and then put back is glucose. If a doctor notices that there is glucose in a patient's urine sample, then what would be a reasonable explanation?
1. The patient must be on a low carbohydrate/high protein diet.
II. The patient has too many carbohydrates in his/her blood.
111. The patient is dehydrated.
IV. The patient has diabetes.
A) I only
B) il only
I and II only
D) II and IV only

Answers

Answer:

I think its II and Iv

Explanation

Because when they is glucose in a patient's urine it means that the patient has diabetes or are too many carbohydrate in his or her blood

if a patient eat too much food containing carbohydrates ,the digestive system breaks down the digestible one into sugar which enters the blood. As blood sugar level rises ,the pancreas produces insulin(a hormone that prompt cells to absorb blood sugar for energy or storage)

which set of parents did the offspring come from?

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Answer:incian.

Explanation:

The main reproductive organ of the plant is the

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Hello!!

                                                  .Stamen.

Structure. As a plant's reproductive part, a flower contains a stamen (male flower part) or pistil (female flower part), or both, plus accessory parts such as sepals, petals, and nectar glands (Figure 19). The stamen is the male reproductive organ. It consists of a pollen sac (anther) and a long supporting filament.

can you please give me brainliest

During the final events of cellular respiration, oxygen combines with ________ to form ________. hydrogen ions only; water carbon only; CO2 energy-depleted electrons and carbon; CO2 energy-depleted electrons and hydrogen ions; water energy-depleted electrons only; water

Answers

Answer:

energy-depleted electrons and hydrogen ions; water

Explanation:

What is the major consideration in setting the lower limit of cell size?
A. The cell size must be small as to fit all the processes and structures to support life.
B. The cell must be large enough to fight the pathogens.
C. The cell must be large enough to attach to a substrate.
D. The lower limit should be small enough for the cell to move in the fluid efficiently.

Answers

Answer:

c

Explanation:

The lower limit should be small enough for the cell to move in the fluid efficiently. Therefore, option (D) is correct.

The major consideration in setting the lower limit of cell size is the need for the cell to move in fluid efficiently. As cells become smaller, their surface area-to-volume ratio increases, allowing for more effective exchange of nutrients, gases, and waste products across their membrane.

This is particularly important for cells living in fluid environments where diffusion plays a crucial role in these exchanges. Small cells have an advantage in absorbing and expelling substances due to their larger surface area relative to their volume. Therefore, the efficiency of nutrient uptake and waste removal becomes more effective with smaller cell sizes, making efficient movement in fluid environments a significant factor in determining the lower limit of cell size. Thus, option (D) is correct.

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persistent depressive disorder, or dysthymia, is characterized by

Answers

Given what we know, we can confirm that persistent depressive disorder, or dysthymia, is characterized by the presence of prolonged depressive symptoms.

What is a depressive disorder?A depressive disorder is a condition that causes a lack of motivation, happiness, and other positive feelings.Depression is experienced by millions of people from around the world. It can be induced by events in one's life, or be caused by a chemical imbalance in the brain.

What separates it from depression?What separates a depressive disorder from a more common case of depression is the frequency by which the symptoms manifest. They are known as depressive disorders when the symptoms are chronic in nature, meaning they manifest repeatedly and for prolonged durations.

Therefore, we can confirm that persistent depressive disorder, or dysthymia, is characterized by persistent symptoms relating to depressive episodes, that are chronic in nature and often caused by chemical imbalances in the brain.

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Think back to the activity from the beginning of the lesson. After what you have
learned about substances and mixtures, how have your ideas changed?

Answers

Answer:

......what lesson....

Explanation:

would you mind clearing up the question a little

the baltimore system classifies viruses based predominantly on

Answers

Answer:

Baltimore classification is a system used to classify viruses based on their manner of messenger RNA (mRNA) synthesis. By organizing viruses based on their manner of mRNA production, it is possible to study viruses that behave similarly as a distinct group.

which of the following is a way that human modification of limiting factors causes unbalance in ecosystems? a. habitat loss b. pollution c. climate changes d. all of the above

Answers

Answer:

D all of the above

Explanation:

The way that human modification of limiting factors causes imbalance in the ecosystem is : ( D ) All of the above

What are limiting factors

Limiting factors are factors contraining the growth of a population in an ecosystem. the modification by humans on these limiting factors causes an imbalance in the ecosytem which leads to loss of habitat, pollution and climate changes.

Hence we can conclude that The way that human modification of limiting factors causes imbalance in the ecosystem is : ( D ) All of the above.

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If the first nucleotide after the promoter on the bottom DNA strand is changed from C to T, what would the resulting nucleotide be on the mRNA

Answers

I’m pretty sure it’s G U

When the DNA's C is changed to T, the corresponding nucleotide on the mRNA strand will be A (adenine) to maintain the complementary base pairing.

Nucleotides encode genetic information in DNA. Due to complementary base pairing laws, DNA sequence alterations impact mRNA transcript nucleotides. If the first nucleotide following the promoter on the bottom DNA strand changes from C (cytosine) to T (thymine), the matching mRNA strand nucleotide becomes A.

Because C pairs with G (guanine) in DNA and RNA. T in DNA matches A in RNA owing to complementary pairing. The DNA sequence will influence the mRNA sequence during transcription, which may impact the protein synthesised during translation.

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Underground stem of which of the following does not store food? a)Zaminkand
b)Colocasia
c)Turmeric
d)Asparagus​

Answers

Answer:

asparagus doesn't store food.

During which phase(s) of mitosis are structures like the one shown in Figure 10–2 visible?

Answers

Answer:

Prophase

Explanation:

Not 100% sure though.

Answer:

Prophase

Explanation:

During prophase, chromosomes condense which is why it looks like that

Scientists have inserted a gene that codes for resistance to a biodegradable weed killer into a certain plant. Which of the following is the most likely benefit of the gene?
O The plant is more likely to survive when exposed to the weed killer
O The plant will be able to convert the weed killer into fertilizer.
O The plant will be able to produce chemicals to kill weeds around it.
O The plant is more likely to die when exposed to the weed killer.

QUICK PLEASE​

Answers

Answer:

The plant is more likely to survive when exposed to the weed killer

Explanation:

since it has a gene that is resistant to the weed killer, it wont be affected by it.

resistant means it can defend itself from something

If a person has just returned from a trip abroad and is feeling sleeping during daylight hours. What hormone and gland may be impacting this disruption

Answers

melatonin from the anterior pituitary gland!

(compound microscope)
1. Put a table lamp in front of the?
2. Put a low-power (, e.g., x5) ________into
the microscope.
3. Rotate a low-power (e.g., x4)
______________into position.
4. Look through the eyepiece. Adjust the __________________ until you see a bright circle of light.
5. Place a slide on the _________, and fix it with the __________. The ___________ on the slide should be right above the hole of the stage.
6. Look at the microscope from the side. Turn the ______
carefully to lower the objective until it is very close to the ________.
7. Look through the eyepiece. Turn the coarse
adjustment knob to raise the objective slowly until
you can see an __________ of the specimen.
7. Turn the ________ to get a sharper image. The image is now in focus.


Choices: microscope, eyepiece, objective, coarse adjustment knob, slide, specimen,
mirror, stage, clips, fine adjustment knob, image

Answers

In this exercise it is necessary to fill the gaps with the correct given word. So, the right order of words will be:

1. microscope

2. eyepiece

3. objective

4. mirror

5. stage

6. clips

7. specimen

8. coarse adjustment knob

9. slide

10. image

11. fine adjustment knob.

So, after filling all the gaps, the text and, consequently, the final answer will be:

1. Put a table lamp in front of the microscope.

2. Put a low-power (, e.g., x5) eyepiece into  the microscope.

3. Rotate a low-power (e.g., x4)  objective into position.

4. Look through the eyepiece. Adjust the mirror until you see a bright circle of light.

5. Place a slide on the stage, and fix it with the clips. The specimen on the slide should be right above the hole of the stage.

6. Look at the microscope from the side. Turn the coarse adjustment knob

carefully to lower the objective until it is very close to the slide.

7. Look through the eyepiece. Turn the coarse  adjustment knob to raise the objective slowly until  you can see an image of the specimen.

8. Turn the fine adjustment knob to get a sharper image. The image is now in focus.

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Other Questions
write a equation of the line that goes through the points (-2,-4) (0,6) I will go shopping while you (cook/cooking/cooked) cyclic voltametry allows one to measure the __________ of a compound. It was Saturday afternoon when the boys of Wedderburn School went off as usual to swim their boats on a beautiful lake, only a quarter of a mile away. Fred Langton had a new boat, a regular beauty, which his grandfather had sent to him as a birthday present, and it must be admitted that many admiring eyes were directed to this boat, for it was a larger and better-constructed one than any of the others, and each boy was of course, anxious that his own boat should win the race. But although all the boys admired Fred's boat, and wished that they could have had one as good, still they felt no grudge towards Fred himself, for he was a general favorite in the school, being kind-hearted, unselfish, always willing to lend anything that he had to his companions, and never known to tell tales, or to do a mean action of any kind. "I tell you," said Bill Cowan to his own particular chum, Joe Morris, "that boat of Fred's will beat ours all hollow! I wish I had one as good!" "Well, suppose it does win," replied Joe Morris, "I shall not grudge it to him, for Fred is no sneak; he is out-and-out the jolliest fellow in Wedderburn School." "So he is," said Bill Cowan, "and no mistake about it. Well, here we are at the lake, and now for some fun." On this particular Saturday, however, Fred was destined to distinguish himself in quite another way, and to win the applause not only of his companions, but of the people who were walking up and down the border of the lake, enjoying the sunshine and the refreshing breeze. The little boats were all in full sail, and the schoolboys were shouting with glee at the fun, when quite suddenly a fine fox terrier took it into his head to pursue the boats and show that he could swim as well as they could. Poor dog! It was quite true that he could swim; but unfortunately he got entangled among weeds, and after floundering about for a little and barking piteously for help, he gradually sank till his body was quite out of sight, only his head and neck being visible to the schoolboys, who looked on in horror, not knowing how they could save the poor animal. "Oh, I say, I can't stand this!" cried Fred Langton; "he will be drowned. I must go in and fetch him out!" "No, no!" cried Bill Cowan; "the lake is quite deep just at that place." "Yes, I know it's deep," added Joe Morris, "and, besides, you can't swim, Fred; don't be silly. Who cares . . . ?" "I do, for one," cried Fred, and dashing into the water he waded out to where the poor dog was half-standing, half-lying, among the choking weeds. Yes, the water was deep; but stretching out his arms he contrived to catch hold of the poor animal, and he quickly waded back to shore amid ringing cheers from all the people who had now gathered on the bank to watch the plucky lad. And whose was the dog? Nobody knew; it seemed, indeed, to have no owner and no home. But Fred and his companions carried it back with them to the school, and, after having told their tale, they begged the head master to keep it for himself; and as Dr. Williams could not discover anything about the dog's ownership, he did keep it. So Fred's brave deed not only saved the animal's life, but procured a good home for it as well. PLS HELP ASAP ILL GIVE BRAINLKEST THANKS PLS ANSWER Use the remainder theorem to find P(-3) for P(x) = 2x + 4x+4.Specifically, give the quotient and the remainder for the associated division and the value of P(-3).Quotient= ?Remainder= ?P(-3) = ? all alankaar with example name national and international government agencies and private organizations 1- '' : , , , how to move when you get paralyze what is the genotype of a ""normal"" male with no hemophilia a? REWhich graph represents the function f(x) = -X2 + 5?N10-8-62o-10 -56-4caM46810Xdo ou A(n) ________, a free solo passage without orchestral accompaniment, is a typical feature of a concerto. Group of answer choices codetta introduction cadenza development Read the sentence. Carolina usually plays third base, but she is going to played first base in the game tomorrow. Which is the best replacement for the underlined word? player plays play playing. in plants, tubes transport nutrients throughout the plant. which parts carry out that function in humans? Jane's height to Max's height is in the ratio 4:7. If Max's height is 210cm, what is Jane's height? * Who were the Republican and Democratic candidate in 1928? In Spanish, answer the following questions with a s or a no using complete and detailed sentences. Ejemplo: Te gusta caminar por el parque?S, me gusta caminar por el parque. -o- No, no me gusta caminar por el parque.A ti, te gustan las verduras?Te gusta jugar deportes?A ti, te gusta dibujar?Te gusta ir a las fiestas?Te gusta el chocolate?You will be graded on (a) message organization, (b) control of target grammar structures, (c) accuracy of mechanics, (d) control of target vocabulary, (d) and task completion per the World Languages Writing Rubric. Helpppppppppp please PLEASE HELP!!! WILL MARK AS BRAINLIEST!!! D:A. SICKLE CELL ANEMIA: GENETICS AND EVOLUTIONCircle the mutation in DNA of the sickle-cell beta-globin gene fragment in the table below:Wild-type beta-globin gene fragment C A C G T A G A C T G A G G A C T CSickle-cell beta-globin gene fragment C A C G T A G A C T G A G G A C A CTranscribe beta-globin DNA into mRNA. Note: DNA is already arranged in triplet sets (below).Translate mRNA codons into amino acids of hemoglobin protein sequence using the chart on page 3.Wild-type beta-globin gene fragment C A C G T A G A C T G A G G A C T CTranscription produces mRNA fragment: Translation produces wild-type beta-globin polypeptide fragment: Sickle-cell beta-globin gene fragmentC A C G T A G A C T G A G G A C A CTranscription produces mRNA fragment: Translation produces mutant beta-globin polypeptide fragment: